Siemens ed1055-1ma00-0ba2

By Abdullah Zahid
11 min read
Siemens 6ED1055-1MA00-0BA2 LOGO! AM2 analog input expansion module mounted on DIN-35 rail in industrial control cabinet

Siemens 6ED1055-1MA00-0BA2 LOGO! AM2 Expansion Module: Specs, Compatibility, and Selection Guide

Controls engineers adding analog sensing to a Siemens LOGO! 8 system have a specific problem: the base unit handles logic, but process signals from pressure transducers, level sensors, and flow transmitters need a dedicated analog input path. The Siemens 6ED1055-1MA00-0BA2 — the LOGO! AM2 expansion module — solves that directly, adding 2 analog input channels supporting 0-10 V or 0/4-20 mA signals to any LOGO! 8 base unit, powered from a 12 V DC or 24 V DC supply, in a 35.5 mm wide DIN-rail footprint that fits alongside the controller in most standard cabinets.

If you have already confirmed this is the right part for your LOGO! 8 system, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Buy the 6ED1055-1MA00-0BA2 — and Who Shouldn't

The Siemens 6ED1055-1MA00-0BA2 is the correct choice for engineers expanding an existing LOGO! 8 installation with analog input capability. It is right for your project if all of the following are true:

  • Your base controller is a LOGO! 8 unit with a part number starting with 6ED1052 — not a LOGO! 6 or LOGO! 4
  • Your sensors output 0-10 V or 0/4-20 mA — not RTD, thermocouple, or high-voltage signals
  • You have a 12 V DC or 24 V DC regulated supply available in the cabinet
  • You need exactly 2 analog input channels — not 4, not digital, not high-speed counters
  • You have 35.5 mm of DIN-35 rail space adjacent to your LOGO! 8 base unit with a free expansion port

If you need more than 2 analog inputs, the 6ED1055-1MM00-0BA2 (LOGO! AM4, 4 analog inputs) is the correct upgrade. If you need digital I/O expansion instead of analog, the 6ED1055-1MB00-0BA2 (LOGO! DM16) is the appropriate module.

On this page:

What the 6ED1055-1MA00-0BA2 Does in a Real Automation System

The Siemens 6ED1055-1MA00-0BA2 is a compact analog input expansion module in the LOGO! expansion module family, specifically built for the LOGO! 8 platform. It adds 2 analog input channels — AI1 and AI2 — to a LOGO! 8 base unit that has no native analog input capability, or that has exhausted its onboard analog resources. The module accepts continuous voltage or current signals from industrial sensors and converts them into 10-bit digital values the LOGO! 8 controller can read, process, and act upon in a control program.

Each channel is independently configurable as 0-10 V or 0/4-20 mA, making it compatible with the two most common analog signal standards found on industrial pressure transducers, temperature transmitters, level sensors, and flow meters. The 10-bit resolution delivers 1024 discrete values across the full input range — translating to 0.01 V per bit on a 0-10 V channel and 0.0156 mA per bit on a 4-20 mA channel. For temperature monitoring, pressure feedback, and level control in small to mid-size automation projects, this resolution is consistent with industry-standard process control accuracy requirements.

The module draws supply power from a 12 V DC or 24 V DC regulated source, mounts on standard DIN-35 rail at 35.5 mm wide, 90 mm tall, and 58 mm deep, and connects directly to the LOGO! 8 base unit via the expansion port — no intermediate gateway or additional wiring harness required. Channel type configuration is handled entirely in LOGO! Soft Comfort software; there are no physical dip switches on the module itself.

Typical System Architecture for the LOGO! AM2

The 6ED1055-1MA00-0BA2 sits between the analog field sensor layer and the LOGO! 8 logic controller, acting as the analog-to-digital conversion bridge in the signal chain.

  • Field sensors (pressure transducers, temperature transmitters, level sensors) output 0-10 V or 0/4-20 mA signals via twisted-pair or shielded cable to the cabinet
  • Analog signal wires terminate at the AI1 and AI2 terminal blocks on the 6ED1055-1MA00-0BA2
  • The module converts these continuous signals to 10-bit digital values and passes them to the LOGO! 8 base unit through the expansion port connection
  • The LOGO! 8 base unit (6ED1052-xxxx) executes the control program logic using analog input values alongside its digital I/O channels
  • Output actions — relay switching, motor control signals, alarm activation — are driven by the base unit based on thresholds and conditions programmed in LOGO! Soft Comfort

Industries and Applications Where This Module Fits

In food and beverage processing, the 6ED1055-1MA00-0BA2 is commonly deployed for tank temperature monitoring and ingredient proportioning, where 4-20 mA temperature transmitters feed analog values directly to the LOGO! 8 for setpoint comparison and control output.

Water treatment and pump station applications use the module for level sensing in basins and reservoirs, with 0-10 V submersible level sensors providing continuous fill-level feedback to drive pump start/stop logic without the cost of a full industrial PLC.

HVAC and climate control systems use the AM2 for ambient humidity and temperature monitoring, where 0-10 V transmitters feed data into building automation logic running on LOGO! 8 — a cost-effective approach for smaller facilities or zone controllers.

Pneumatic and hydraulic systems benefit from 4-20 mA pressure transducer integration, using the module to implement pressure-based alarm logic, pump protection, or proportional valve feedback in a compact cabinet footprint.

Energy and power monitoring applications route 4-20 mA current transducer outputs through the module to track consumption trends and trigger demand-response logic in manufacturing or facilities management contexts.

Application Typical Deployment
Food and beverage processing 4-20 mA temperature transmitters on tanks feeding LOGO! 8 batch control logic
Water and wastewater treatment 0-10 V level sensor in basin driving pump start/stop via LOGO! 8 relay output
HVAC and climate control 0-10 V humidity and temperature transmitters feeding zone control logic
Pneumatic and hydraulic systems 4-20 mA pressure transducer for pump protection and alarm thresholds
Energy monitoring 4-20 mA current transducer output tracked by LOGO! 8 for demand-response triggering
Environmental and agricultural monitoring 0-10 V analog sensors for soil moisture, ambient conditions, or greenhouse climate control

6ED1055-1MA00-0BA2 Technical Specifications

Parameter Value
Supply Voltage 12 V DC or 24 V DC (regulated)
Analog Input Channels 2 (AI1, AI2)
Input Range — Voltage 0–10 V
Input Range — Current 0/4–20 mA
Resolution 10-bit (1024 discrete values)
Protection Rating IP20
Dimensions (H × W × D) 90 mm × 35.5 mm × 58 mm
Weight 0.29 lbs
Mounting DIN-35 rail
RoHS Compliance Yes (since 08/04/2014)

Full technical specifications are available on the product page at LeadTime.ca.

LOGO! AM2 vs. AM4 vs. DM16: Which Module Do You Actually Need?

Module Part Number Channels Input Type Supply Voltage Best For
LOGO! AM2 6ED1055-1MA00-0BA2 2 Analog (0-10 V / 0/4-20 mA) 12/24 V DC Basic analog sensing with 1–2 sensors
LOGO! AM4 6ED1055-1MM00-0BA2 4 Analog (0-10 V / 0/4-20 mA) 12/24 V DC Multi-sensor systems requiring 3–4 analog inputs
LOGO! DM16 6ED1055-1MB00-0BA2 16 Digital I/O 24 V DC Digital on/off expansion, not analog sensing
LOGO! 8 Base 6ED1052-xxxx — Core controller 24 V DC Required host unit for all expansion modules

If your architecture uses 0-10 V or 0/4-20 mA signals and you need exactly 2 analog input channels, the 6ED1055-1MA00-0BA2 is the correct choice — check current availability at LeadTime.ca.

Expert Verdict: Honest Assessment for Procurement and Engineering Teams

The Siemens 6ED1055-1MA00-0BA2 does exactly what it claims — no more, no less. For engineers running a LOGO! 8 system who need to bring in 1 or 2 analog process signals without adding an external signal converter, a gateway, or a separate analog card from a different product family, this module is the cleanest solution available. The 10-bit resolution covers the accuracy requirements of the vast majority of temperature, pressure, and level applications in food processing, water treatment, HVAC, and light manufacturing. The 35.5 mm footprint genuinely fits tight cabinets. The LOGO! Soft Comfort configuration is straightforward — channel type selection is a software setting, not a hardware jumper hunt. The LOGO! 8 platform has shipped millions of units globally since 2010, and this module category is a well-proven part of that installed base.

Where it has real limits: if you need more than 2 analog channels, stacking this module is a valid approach but the 6ED1055-1MM00-0BA2 (AM4) gives you 4 channels in the same rail footprint and may be more economical per channel. If any of your sensors output RTD or thermocouple signals directly, this module cannot accept them without an external transmitter converting the signal to 0-10 V or 4-20 mA first — that is a wiring and cost consideration worth resolving before ordering. And if your process control requirements demand resolution beyond 10-bit, or sub-second scan time precision, the LOGO! 8 platform as a whole is the constraint — not just this module. Those applications belong on an S7-1200 or S7-1500 platform. The IP20 protection rating means this is an indoor, cabinet-mounted module only — not suitable for panel-face or outdoor enclosure mounting without appropriate cabinet protection.

From a procurement standpoint, the 6ED1055-1MA00-0BA2 is an active, supported Siemens product with standard distributor availability. Lead times through authorized channels are typically in the 2–4 week range, with faster turnaround possible from stocked distributors. If you are building multiple systems or running a service stock, volume pricing through LeadTime.ca is worth confirming before committing to single-unit pricing. If this module matches your system requirements, view current stock and pricing at LeadTime.ca.

For volume pricing or to confirm lead time before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

Wiring and Installation Overview

  • Mount the module on DIN-35 rail directly adjacent to the LOGO! 8 base unit and align the expansion port connector — the module must seat fully into the base unit expansion port before applying power
  • Apply a 12 V DC or 24 V DC regulated supply to the module power terminals and install an upstream fuse or circuit breaker sized for the combined load of the base unit and all expansion modules
  • For 0-10 V sensors, connect the signal wire to the positive terminal of AI1 or AI2 and the sensor ground return to the corresponding negative terminal — do not share signal ground with high-current or motor circuits
  • For 4-20 mA current loops, connect the transmitter positive to the AI1 or AI2 high terminal and transmitter negative to the low terminal to complete the loop — verify no additional series devices are in the loop unless an isolation resistor is intentionally included
  • Use twisted-pair or shielded cable for all analog signal runs, ground the shield at the cabinet end only to prevent ground loops, and route analog cables away from high-voltage conductors and motor drive wiring to maintain signal integrity

Wrong-Part Prevention: Confirm Before You Order

Before placing an order for the Siemens 6ED1055-1MA00-0BA2, verify each of the following points against your actual system and project requirements:

  1. Confirm your base controller is LOGO! 8 (part number starts with 6ED1052) not earlier LOGO! 6 or 4
  2. Check that your sensors output 0-10 V or 0/4-20 mA (not higher voltage, current loop-only, or RTD/thermocouple)
  3. Verify 12 V DC or 24 V DC auxiliary supply is available in your cabinet
  4. Ensure you need exactly 2 analog inputs (not 4, not digital, not high-speed counters)
  5. Check DIN-rail mounting space: module requires 35.5 mm width and accepts DIN-35 profile
  6. Confirm your LOGO! 8 base unit has free expansion port for this module type

If every item on this list checks out, proceed to the product page at LeadTime.ca to confirm current stock and pricing, or contact the team if you need to verify compatibility before ordering.

Frequently Asked Questions

Is the 6ED1055-1MA00-0BA2 compatible with LOGO! 6 or older LOGO! units?

No. The 6ED1055-1MA00-0BA2 is designed exclusively for the LOGO! 8 platform — base units with part numbers starting with 6ED1052. It is not backward compatible with LOGO! 6 or LOGO! 4 hardware. Attempting to connect it to an older base unit will result in a non-functional installation.

Can I use RTD or thermocouple sensors directly with this module?

No. The 6ED1055-1MA00-0BA2 accepts 0-10 V and 0/4-20 mA signals only. RTD and thermocouple sensors require external signal conditioning — an appropriate temperature transmitter with a 4-20 mA or 0-10 V output converts the sensor signal to a format this module can accept. Connecting an RTD or thermocouple directly to the analog input terminals will not produce valid readings.

What is the resolution of the analog inputs, and is it adequate for process control?

The module provides 10-bit resolution, which produces 1024 discrete values across the full input range. On a 0-10 V channel, this equals 0.01 V per bit. On a 4-20 mA channel, this equals 0.0156 mA per bit. For the temperature, pressure, level, and flow monitoring applications this module is intended for in small to mid-size automation projects, 10-bit resolution meets industry-standard accuracy requirements. Applications demanding higher resolution should evaluate the S7-1200 or S7-1500 platform.

How many 6ED1055-1MA00-0BA2 modules can I connect to a single LOGO! 8 base unit?

The number of expansion modules a LOGO! 8 base unit can accept depends on the specific LOGO! 8 model and the available expansion port capacity of that unit. Verify the expansion slot count for your specific 6ED1052-xxxx base unit before planning a multi-module configuration. The 6ED1055-1MM00-0BA2 (AM4) providing 4 analog inputs may be a more efficient option if you need to maximize analog channel count within a limited number of expansion slots.

Does the channel type (voltage vs. current) need to be set with a hardware switch or jumper?

No hardware switches are required. Channel type selection for AI1 and AI2 — whether 0-10 V or 0/4-20 mA — is configured in LOGO! Soft Comfort software when setting up the LOGO! 8 program. This means channel types can be changed during commissioning without opening the wiring or physically modifying the module.

What supply voltage does the 6ED1055-1MA00-0BA2 require, and can it share power with the LOGO! 8 base unit?

The module requires 12 V DC or 24 V DC from a regulated supply. Whether it can share the same supply rail as the LOGO! 8 base unit depends on the available current capacity of that supply and the total load of all connected modules. Always verify the combined current draw against the supply's rated output and include an upstream fuse or circuit breaker sized appropriately for the full expansion system load.

Why Source the 6ED1055-1MA00-0BA2 Through LeadTime.ca

  • Ships worldwide — no geographic restriction on orders regardless of project location
  • Specialized in industrial automation components including hard-to-source and shorter-run Siemens expansion modules
  • Volume pricing available for multi-unit orders or service stock builds — contact the team before committing to single-unit pricing
  • Fast response on availability and lead time inquiries, relevant for project timelines where procurement confirmation is on the critical path

At-a-Glance Summary

  • The Siemens 6ED1055-1MA00-0BA2 adds 2 analog input channels (AI1, AI2) to any LOGO! 8 base unit (6ED1052-xxxx)
  • Accepts 0-10 V or 0/4-20 mA signals, selectable per channel in LOGO! Soft Comfort — no hardware jumpers
  • 10-bit resolution delivers 1024 discrete values: 0.01 V per bit on voltage range, 0.0156 mA per bit on current range
  • Supply voltage: 12 V DC or 24 V DC regulated; IP20 protection rating for indoor cabinet installation
  • Physical footprint: 90 mm × 35.5 mm × 58 mm, DIN-35 rail mount, weight 0.29 lbs
  • RoHS compliant since 08/04/2014; active, supported Siemens product
  • Not compatible with LOGO! 6 or LOGO! 4; does not accept RTD or thermocouple signals directly
  • For more than 2 analog inputs, use the 6ED1055-1MM00-0BA2 (AM4); for digital I/O expansion, use the 6ED1055-1MB00-0BA2 (DM16)